(PECL imagick 2, PECL imagick 3)
Imagick::adaptiveSharpenImage — Adaptively sharpen the image
$radius, float $sigma, int $channel = Imagick::CHANNEL_DEFAULT): boolAdaptively sharpen the image by sharpening more intensely near image edges and less intensely far from edges. 此方法在Imagick基于ImageMagick 6.2.9以上版本編譯時(shí)可用。
radiusThe radius of the Gaussian, in pixels, not counting the center pixel. Use 0 for auto-select.
sigmaThe standard deviation of the Gaussian, in pixels.
channel
Provide any channel constant that is valid for your channel mode. To apply to more than one channel, combine channel constants using bitwise operators. 缺省為Imagick::CHANNEL_DEFAULT.
參考此 通道常數列表
成功時(shí)返回 true。
示例 #1 A Imagick::adaptiveSharpenImage() example
Adaptively sharpen the image with radius 2 and sigma 1.
<?php
try {
$image = new Imagick('image.png');
$image->adaptiveSharpenImage(2,1);
} catch(ImagickException $e) {
echo 'Error: ' , $e->getMessage();
die();
}
header('Content-type: image/png');
echo $image;
?>